This study developed a facile and scalable thermal oxidation method to prepare CuO nanowires on the electro-discharge machining (EDM) processed V-shaped microgrooves. The formation feasibility, surface morphology, and wetting properties of nanowires on V-shaped microgrooves were explored by the variation of thermal oxidation temperatures from 300 to 600 °C, and oxidation times from 2 h to 8 h. Nanowires were found to successfully synthesized on the V-shaped microgrooves surfaces when annealing temperature was 400 °C or higher. The microvoids or microcavities on the EDM processed V-shaped microgrooves surfaces contributed to the stress grain boundary (GB) diffusion of copper atoms, and facilitated the growth of nanowires. The diameter of nanowires increased monotonically when the annealing temperatures increased, whereas it almost kept unchanged with increasing annealing times. The length of nanowires was influenced positively by both annealing temperature and annealing time. All the nanowire samples showed hydrophobic properties of water.

这项研究开发了一种简便且可扩展的热氧化方法，以在放电加工（EDM）处理的V形微槽上制备CuO纳米线。通过300到600°C的热氧化温度和2 h到8 h的氧化时间的变化，探讨了纳米线在V形微槽上的形成可行性，表面形态和润湿性能。发现当退火温度为400℃或更高时，纳米线成功地在V形微槽表面上合成。EDM处理的V形微槽表面上的微孔或微腔有助于铜原子的应力晶界（GB）扩散，并有助于纳米线的生长。随着退火温度的升高，纳米线的直径单调增加。而随着退火时间的增加，它几乎保持不变。退火温度和退火时间都对纳米线的长度有积极的影响。所有的纳米线样品均显示出水的疏水性。